The only reliable evidence that anything is there at all comes from the air, and even then only under the right conditions. On certain dry summers, when soil moisture varies between disturbed and undisturbed ground, the ghost of an old circular enclosure appears as a cropmark, a faint difference in the colour and growth of whatever is planted or growing above it, tracing out a shape that has otherwise vanished entirely from the surface of the land.

The site was first formally identified during the Bruff aerial photographic survey in 1986, when a photograph catalogued as Bruff 136, AP 4/3723 captured what appeared to be an oval-shaped cropmark roughly 90 metres south-west of Sun Ville house. A cropmark forms when buried features such as ditches or walls affect how plants grow above them, ditches retaining moisture and producing lusher growth, while stone foundations stress vegetation and leave paler marks. Orthophotos taken by Ordnance Survey Ireland between 2005 and 2012 showed a partial outline of a roughly circular enclosure with a diameter of approximately 28 metres, though by the time Google Earth captured the same ground on 18 November 2018, it had disappeared completely. A second enclosure, recorded separately as LI024-323, sits just 30 metres to the east-south-east, suggesting this corner of Limerick farmland may have seen sustained activity over a long period, though the nature and date of either feature remain unconfirmed without excavation. The site also abuts a former townland boundary, one that was itself shifted around 50 metres to the south-west sometime between 1840 and 1897, a small administrative adjustment that nonetheless complicates the historical reading of the landscape.

There is nothing to see on the ground in any conventional sense. The enclosure sits in private agricultural land and has no public access, no marker, and no infrastructure. Its interest lies almost entirely in what it represents methodologically: a site known only through aerial observation, recorded by Alison McQueen and Vera Rahilly and uploaded to the national monuments database in July 2020, that exists in the archaeological record without ever having been touched. For anyone interested in how Irish field monuments are actually identified and catalogued, this is a useful example of the limits and possibilities of remote survey, a circular form that appears and disappears depending on season, crop type, and weather, waiting for conditions that may or may not recur.